Classifications

• • C—CHEMISTRY; METALLURGY
  • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
  • C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
  • C12P13/00—Preparation of nitrogen-containing organic compounds
  • C12P13/04—Alpha- or beta- amino acids
  • C12P13/14—Glutamic acid; Glutamine
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S435/00—Chemistry: molecular biology and microbiology
  • Y10S435/8215—Microorganisms
  • Y10S435/822—Microorganisms using bacteria or actinomycetales
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S435/00—Chemistry: molecular biology and microbiology
  • Y10S435/8215—Microorganisms
  • Y10S435/822—Microorganisms using bacteria or actinomycetales
  • Y10S435/858—Methylomonas

Definitions

• thiamine is required for growth of some of the microorganisms.
• strains to be employed in this invention were selected from dozens of microorganisms isolated from soil, sewage, compost, humus, oils and petroleum sources by their ability of producing L-glutamic acid when cultured with shaking at 30 C for 40 hours in an aqueous medium having the following composition:
• the selected strains include both thiamine-requiring and non thiamine-requiring bacteria.
• STRAIN NO. Ml6-8 (ATCC 21369)
• strain M16-8 assimilates only methanol, it is differentiated from Methanomonas methanica (or Pseudomonas methanica) or from Methanomonas methanooxidans, and from many others which also assimilate other carbon sources, e.g., sugars, alcohols, organic acids, hydrocarbons, alkylamines and so on.
• Methanomonas methanica or Pseudomonas methanica
• Methanomonas methanooxidans and from many others which also assimilate other carbon sources, e.g., sugars, alcohols, organic acids, hydrocarbons, alkylamines and so on.
• a variety of this species is light yellow on salts-methanol agar or on synthetic-methanol agar; and yellow on nutrientmethanol agar.
• Synthetic-methanol (1 percent methanol) broth: (l-4 days) Abundant growth, ring or pellicle, turbid.
• pH for growth optimum for growth, 7.0 to 8.0; pH limits for growth, 5.2 to 9.5
• Alkylamine media (monoethylamine and dimethylamine): growth after 7 days only with thiamine-HCI (500ug/1) added.
• strain M-7 may be properly classified into genus Protaminobacter in accordance with Bergeys manual.
• the motile strain M135-7 is achrornogenic and assimilates only methanol. Such characteristics differentiate it from Protaminabacter ruber and from other known species of genus Protaminobacter.
• STRAIN NO. M89-3A (ATCC 21372) A. Morphological observations (Salts-methanol (1 percent methanol) agar slant, 20-24 hr) Vegetative cells: straight or slightly curved rods, usually 0.4-0.7 1.0-2.5, occurring singly or in pairs.
• Pleomorphic elongated cells and swollen cells (1.0-1.5 X
• pH for growth optimum pH, 6.5 to 7.5; pH limits for growth, 5.2 to 8.5
• Chromogenesis white or milk white.
• the strain M89-3A can be fitted into genus Protaminobacter. but is distinguished from the only nonmotile species, P. alboflavus which grows on ordinary biological media assimilating organic acids, amino compounds, amines and ethyl alcohol. We therefore consider the strain M89-3A a new species Protaminobacter candidus. We have found two varieties of this species, of which Variety A shows negative nitrate reduction and positive urease activity; and Variety B, positive nitrate reduction and negative urease. The varieties of the species are more rough and dull in appearance on salts-methanol or synthetic-methanol agar media.
• STRAIN NO. M224-3 (ATCC 21373) A. Morphological observations (Nutrient agar slant, -24, hr)
• Vegetative cells slightly curved rods, 0.5-1.0 X 1.7-3.0 microns, which form a closed ring during growth.
• the rings grow into bodies which subdivide again into rodshaped elements as at the beginning. Occasionally, during growth, the rods form spiral-shape by chain.
• Salts-methanol agar stroke (over 10 days) No or scanty growth 4. Synthetic-methanol agar stroke:
• Late growth after 2-3 days, moderate growth, beaded to filiform (3-5 days), rough to smooth, white or ivory, opaque, butyrous. Medium unchanged.
• Potato plug (3-5 days) Late growth, filiform, dull, white. Medium unchanged.
• pH for growth optimum pH, 7.0 to 7.5; pH limits for growth, 5.5 to 9.2
• Acid but no gas, produced oxidatively and fermentatively from the following carbohydrates: arabinose, galactose, xylose, glucose and mannitol.
• the strain M224-3 can grow on mineral salts medium containing 1 percent methanol, only when yeast extract (0.01 percent or more) or thiamine-HCl ug/l or more) is added to the medium; and in about 3 days, the strain produces acid from glucose.
• M224-3 is distinguished from M. aquaticus and is considered a new species Microcyclus eburneus.
• the media used are outlined as follows:
• Synthetic-methanol medium The basal medium has the same composition as the medium used for the selection of the strains.
• Heinamann nitrogen-free glucose agar medium in which glucose is replaced by 1 percent methanol.
• Salts-methanol medium 1 percent methanol added to Dworkin and Foster medium.* M. Dworkin and J.W. Foster, J.
• Alkylaminc agar medium den Dooren de .long medium (*den Dooren de Jong, Zentr. Bakteriol. Parasitenk., Abt. I1,
• the culture broth was diluted with 20 volumes of water. Then, the growth was measured by optical density at 610 my; and the amount of bglutamic acid accumulated, was determined by microbiological assay with Lactobacillus arabinosus. The results are summarized below:
• an appropriate amount of thiamine is either indispensable or desirable for the production of glutamic acid in a substantial amount.
• the abilities of the microorganisms to grow and produce said acid with the addition of thiamine vary from one strain to another. They do not grow with too small an amount of thiamine, and an excessive use of it resulted in lowering the yield of the acid.
• methanol can be incorporated in the medium only at the beginning of process, but it is better to start at a low concentration of methanol and feed additional amounts during the process according to the consumption.
• nitrogen sources to be employed includes ammonium sulfate, ammonium nitrate, ammonium carbonate, ammonium chloride, aqueous ammonia, and urea.
• Other nitrogen-bearing substances such as amino acids, corn steep liquor, Aji-eki (soybean hydrolysate bouillon, pepton, yeast extract and other organic nutrient materials produce the usual results, as do the conventional trace elements, vitamins and other secondary nutrients essential for microbial growth in a known manner.
• Metal ions such as Fe, Mn, Zn, Co, Ca, Pb can be supplied with water (stream water, sea water, etc.) containing the same.
• Suitable thiamine sources include yeast extract, liver extract, rice-bran extract, and so on.
• the pH of the culture medium should be maintained between 5.0 and 9.0, and is held initially between 5.5 and 8.0.
• the temperature should be between 16 and 37 C (and preferrably 25 to 34 C). But, some strains can grow and produce glutamic acid at a lower temperature.
• the fermentation is carried out under aerobic conditions and requires generally 1 to 3 days, and occasionally 2 to 4 days, for best results.
• the seed culture broth thus obtained was transferred percent by volume) to a main culture medium of the same composition ml) in a 500-ml Sakaguchi flask, which was cultivated with shaking at 27 C.
• the concentration of said methanol being maintained at an effective level by replenishing said nutrient medium with said methanol during said culturing.
• said microorganism being Methanomonas methylovora (ATCC No. 21369), Methanomonas methylovora var.thiaminophila (ATCC No. 21370), Protaminobacter thiaminophagus (ATCC No. 21371), Protaminobacter candidus (ATCC No. 21372), or Microcyclus ebumeus (ATCC No. 21373).

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• Organic Chemistry (AREA)
• Chemical & Material Sciences (AREA)
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• Life Sciences & Earth Sciences (AREA)
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• Chemical Kinetics & Catalysis (AREA)
• Microbiology (AREA)
• General Chemical & Material Sciences (AREA)
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• Bioinformatics & Cheminformatics (AREA)
• General Engineering & Computer Science (AREA)
• General Health & Medical Sciences (AREA)
• Genetics & Genomics (AREA)
• Preparation Of Compounds By Using Micro-Organisms (AREA)
• Micro-Organisms Or Cultivation Processes Thereof (AREA)

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Citations (2)

• 1968
  • 1968-03-30 JP JP43020617A patent/JPS526358B1/ja active Pending
• 1969
  • 1969-03-24 GB GB05388/69A patent/GB1204306A/en not_active Expired
  • 1969-03-26 US US810785A patent/US3663370A/en not_active Expired - Lifetime
  • 1969-03-28 FR FR6909499A patent/FR2005186A1/fr not_active Withdrawn
  • 1969-03-29 IT IT14844/69A patent/IT1003007B/it active

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